025b779a30
* Perform shebang fix for all files * Fix sbang for perl scripts Otherwise perl would look at the #! line and call sbang again, resulting in an infinite loop.
123 lines
4.2 KiB
Bash
Executable file
123 lines
4.2 KiB
Bash
Executable file
#!/bin/bash
|
|
##############################################################################
|
|
# Copyright (c) 2013-2016, Lawrence Livermore National Security, LLC.
|
|
# Produced at the Lawrence Livermore National Laboratory.
|
|
#
|
|
# This file is part of Spack.
|
|
# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
|
|
# LLNL-CODE-647188
|
|
#
|
|
# For details, see https://github.com/llnl/spack
|
|
# Please also see the LICENSE file for our notice and the LGPL.
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU Lesser General Public License (as
|
|
# published by the Free Software Foundation) version 2.1, February 1999.
|
|
#
|
|
# This program is distributed in the hope that it will be useful, but
|
|
# WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
|
|
# conditions of the GNU Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU Lesser General Public
|
|
# License along with this program; if not, write to the Free Software
|
|
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
##############################################################################
|
|
#
|
|
# `sbang`: Run scripts with long shebang lines.
|
|
#
|
|
# Many operating systems limit the length of shebang lines, making it
|
|
# hard to use interpreters that are deep in the directory hierarchy.
|
|
# `sbang` can run such scripts, either as a shebang interpreter, or
|
|
# directly on the command line.
|
|
#
|
|
# Usage
|
|
# -----------------------------
|
|
# Suppose you have a script, long-shebang.sh, like this:
|
|
#
|
|
# 1 #!/very/long/path/to/some/interpreter
|
|
# 2
|
|
# 3 echo "success!"
|
|
#
|
|
# Invoking this script will result in an error on some OS's. On
|
|
# Linux, you get this:
|
|
#
|
|
# $ ./long-shebang.sh
|
|
# -bash: ./long: /very/long/path/to/some/interp: bad interpreter:
|
|
# No such file or directory
|
|
#
|
|
# On Mac OS X, the system simply assumes the interpreter is the shell
|
|
# and tries to run with it, which is likely not what you want.
|
|
#
|
|
#
|
|
# `sbang` on the command line
|
|
# -----------------------------
|
|
# You can use `sbang` in two ways. The first is to use it directly,
|
|
# from the command line, like this:
|
|
#
|
|
# $ sbang ./long-shebang.sh
|
|
# success!
|
|
#
|
|
#
|
|
# `sbang` as the interpreter
|
|
# -----------------------------
|
|
# You can also use `sbang` *as* the interpreter for your script. Put
|
|
# `#!/bin/bash /path/to/sbang` on line 1, and move the original
|
|
# shebang to line 2 of the script:
|
|
#
|
|
# 1 #!/bin/bash /path/to/sbang
|
|
# 2 #!/long/path/to/real/interpreter with arguments
|
|
# 3
|
|
# 4 echo "success!"
|
|
#
|
|
# $ ./long-shebang.sh
|
|
# success!
|
|
#
|
|
# On Linux, you could shorten line 1 to `#!/path/to/sbang`, but other
|
|
# operating systems like Mac OS X require the interpreter to be a
|
|
# binary, so it's best to use `sbang` as a `bash` argument.
|
|
# Obviously, for this to work, `sbang` needs to have a short enough
|
|
# path that *it* will run without hitting OS limits.
|
|
#
|
|
# For Lua, scripts the second line can't start with #!, as # is not
|
|
# the comment character in lua (even though lua ignores #! on the
|
|
# *first* line of a script). So, instrument a lua script like this,
|
|
# using -- instead of # on the second line:
|
|
#
|
|
# 1 #!/bin/bash /path/to/sbang
|
|
# 2 --!/long/path/to/lua with arguments
|
|
# 3
|
|
# 4 print "success!"
|
|
#
|
|
# How it works
|
|
# -----------------------------
|
|
# `sbang` is a very simple bash script. It looks at the first two
|
|
# lines of a script argument and runs the last line starting with
|
|
# `#!`, with the script as an argument. It also forwards arguments.
|
|
#
|
|
|
|
# First argument is the script we want to actually run.
|
|
script="$1"
|
|
|
|
# Search the first two lines of script for interpreters.
|
|
lines=0
|
|
while read line && ((lines < 2)) ; do
|
|
if [[ "$line" = '#!'* ]]; then
|
|
interpreter="${line#\#!}"
|
|
elif [[ "$line" = '--!'*lua* ]]; then
|
|
interpreter="${line#--!}"
|
|
fi
|
|
lines=$((lines+1))
|
|
done < "$script"
|
|
|
|
# Invoke any interpreter found, or raise an error if none was found.
|
|
if [[ -n "$interpreter" ]]; then
|
|
if [[ "${interpreter##*/}" = "perl" ]]; then
|
|
exec $interpreter -x "$@"
|
|
else
|
|
exec $interpreter "$@"
|
|
fi
|
|
else
|
|
echo "error: sbang found no interpreter in $script"
|
|
exit 1
|
|
fi
|